MOSSBERG 590S M-LOK - 12 GA - 3" - 20" - 7/8/13+1
MossbergThe Mossberg 590S M-LOK 12 Gauge Pump-Action Shotgun redefines versatility by accepting 1¾", 2¾", and 3" shells — individually or in any mixed combination — making it one of the most adaptable defensive and tactical shotguns on the market today.
- Cycles 1¾", 2¾", and 3" shells interchangeably in any combination
- M-LOK forend accepts accessories like lights, grips, and rail sections
- Dual extractors and twin action bars ensure smooth, reliable cycling
- Anti-jam elevator prevents misfeeds during rapid or mixed-load shooting
- Top-mounted ambidextrous safety for fast, intuitive operation left or right-handed
- Magazine clean-out tube with cap simplifies maintenance and clearing
Who This Is For
The Mossberg 590S is built for home defenders, tactical shooters, and range enthusiasts who demand maximum flexibility from a single platform. Whether you're running light 1¾" mini-shells for reduced recoil, standard 2¾" buckshot for home defense, or 3" magnum loads for field use, this shotgun handles it all without adjustment — perfect for those who refuse to compromise on capability or reliability.
Specifications
| Brand | Mossberg |
|---|---|
| Model | 590S M-LOK |
| Gauge | 12 Gauge |
| Chamber | 3" |
| Barrel Length | 20" |
| Capacity | 7+1 / 8+1 / 13+1 (shell-length dependent) |
| Action | Pump Action |
| Shell Compatibility | 1¾", 2¾", and 3" |
| Forend | M-LOK Compatible |
| Safety | Top-Mounted Ambidextrous |
| Receiver | Aluminum Alloy, Logo-Engraved |
| Stock | Synthetic |
| Overall Length | ~39.5" |
| Weight | ~7.25 lbs (unloaded) |
| Country of Origin | USA |
Frequently Asked Questions
What does the 7/8/13+1 capacity rating mean on the 590S?
The capacity varies based on the shell length you load. When using full-size 3" magnum shells, the magazine holds 7 rounds plus 1 in the chamber (7+1). With standard 2¾" shells, you get 8+1. If you load compact 1¾" mini-shells, capacity jumps to an impressive 13+1. You can also mix shell lengths freely — the anti-jam elevator and dual extractors are specifically designed to handle these combinations reliably.
Can the Mossberg 590S reliably cycle all three shell lengths without modification?
Yes — that's the core engineering achievement of the 590S. Unlike standard pump shotguns that may short-stroke or misfeed with 1¾" mini-shells, the 590S is factory-designed with a modified lifter (anti-jam elevator) and dual extractors to cycle 1¾", 2¾", and 3" shells straight out of the box, individually or in mixed loads, with no parts swaps or adjustments required.
What accessories can be attached to the M-LOK forend?
The M-LOK compatible forend lets you attach a wide range of aftermarket accessories directly to the shotgun without additional adapters. Popular additions include tactical weapon lights, vertical foregrips, rail sections for optics accessories, and sling attachment points. M-LOK is an industry-standard mounting system supported by hundreds of accessory manufacturers, giving you extensive options to customize the 590S to your specific needs.
- Caliber:
- 12 GA
- Color:
- Black
- Barrel Length:
- 20"
- Chamber:
- 3"
- Sights:
- Ghost Ring
- Capacity:
- 13+1
- Stock:
- Fixed
- Action:
- Pump
- Type of Barrel:
- Cylinder